#!/usr/bin/env python3
# SPDX-License-Identifier: LGPL-2.1-or-later

from __future__ import absolute_import, print_function, unicode_literals

from optparse import OptionParser, make_option
import os
import sys
import uuid
import dbus
import dbus.service
import dbus.mainloop.glib
try:
  from gi.repository import GObject
except ImportError:
  import gobject as GObject
import bluezutils

BLUEZ_SERVICE_NAME = 'org.bluez'
GATT_MANAGER_IFACE = 'org.bluez.GattManager1'
DBUS_OM_IFACE = 'org.freedesktop.DBus.ObjectManager'
DBUS_PROP_IFACE = 'org.freedesktop.DBus.Properties'

GATT_PROFILE_IFACE = 'org.bluez.GattProfile1'


class InvalidArgsException(dbus.exceptions.DBusException):
    _dbus_error_name = 'org.freedesktop.DBus.Error.InvalidArgs'


class Application(dbus.service.Object):
    def __init__(self, bus):
        self.path = '/'
        self.profiles = []
        dbus.service.Object.__init__(self, bus, self.path)

    def get_path(self):
        return dbus.ObjectPath(self.path)

    def add_profile(self, profile):
        self.profiles.append(profile)

    @dbus.service.method(DBUS_OM_IFACE, out_signature='a{oa{sa{sv}}}')
    def GetManagedObjects(self):
        response = {}
        print('GetManagedObjects')

        for profile in self.profiles:
            response[profile.get_path()] = profile.get_properties()

        return response


class Profile(dbus.service.Object):
    PATH_BASE = '/org/bluez/example/profile'

    def __init__(self, bus, uuids):
        self.path = self.PATH_BASE
        self.bus = bus
        self.uuids = uuids
        dbus.service.Object.__init__(self, bus, self.path)

    def get_properties(self):
        return {
            GATT_PROFILE_IFACE: {
                'UUIDs': self.uuids,
            }
        }

    def get_path(self):
        return dbus.ObjectPath(self.path)

    @dbus.service.method(GATT_PROFILE_IFACE,
                        in_signature="",
                        out_signature="")
    def Release(self):
        print("Release")
        mainloop.quit()

    @dbus.service.method(DBUS_PROP_IFACE,
                         in_signature='s',
                         out_signature='a{sv}')
    def GetAll(self, interface):
        if interface != GATT_PROFILE_IFACE:
            raise InvalidArgsException()

        return self.get_properties[GATT_PROFILE_IFACE]


def register_app_cb():
    print('GATT application registered')


def register_app_error_cb(error):
    print('Failed to register application: ' + str(error))
    mainloop.quit()

if __name__ == '__main__':
    dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)

    bus = dbus.SystemBus()

    path = bluezutils.find_adapter().object_path

    manager = dbus.Interface(bus.get_object("org.bluez", path),
                            GATT_MANAGER_IFACE)

    option_list = [make_option("-u", "--uuid", action="store",
                                type="string", dest="uuid",
                                default=None),
    ]

    opts = dbus.Dictionary({}, signature='sv')

    parser = OptionParser(option_list=option_list)

    (options, args) = parser.parse_args()

    mainloop = GObject.MainLoop()

    if not options.uuid:
        options.uuid = str(uuid.uuid4())

    app = Application(bus)
    profile = Profile(bus, [options.uuid])
    app.add_profile(profile)
    manager.RegisterApplication(app.get_path(), {},
                                reply_handler=register_app_cb,
                                error_handler=register_app_error_cb)

    mainloop.run()
